Malicious PDF — malware analysis report

Static analysis result for SHA-256 20129a964ac74843…

MALICIOUS

PDF

33.7 KB Created: 2021-07-03 21:08:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 0b9d78d7e15ba0c4fe2c418db155fc06 SHA-1: 988a616f5484d91b8c4d25e66e9c77c7eed50e08 SHA-256: 20129a964ac74843345cb712e38e615eb25ce737be01cc314e81c288e1673b33
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a critical heuristic firing for a game hack redirect lure, pointing to malicious infrastructure. The document body also explicitly contains the URL http://netcdn.tw/app/479516143/how-to-get-minecraft-java-for-free-game-hack, which is identified as a known malicious redirector. This suggests the primary purpose is to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://netcdn.tw/app/479516143/how-to-get-minecraft-java-for-free-game-hack In PDF document text
    • https://library.fdk.ac.id/repository/free-robux-card-pins_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/how-to-make-robux_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/roblox-ninja-simulator-hack_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/roblox-two-player-military-simulator-tycoon-money-hack_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/free-mods-for-coin-master_GM406889139.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/coins-master-hacks_GM406889139.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/free-robux-app-2021_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/roblox-jailbreak-hack-money-download_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/roblox-bloxburg-hack_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/how-to-get-minecraft-pocket-edition-for-free_GM479516143.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/roblox-game-studio-unblocked-cheats-download-guide-unofficial-chala-dar_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/is-free-robux-real_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/hacks-for-roblox-counter-blox_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/can-you-make-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/free-roblox-acc_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/apk-hack-online-roblox_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/how-to-open-multiple-roblox-games-without-hacks_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/free-robux-reeddeem-code_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/minecraft-ios-mods_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000030da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30DA 21928 bytes
SHA-256: bb9dd1c9a145e47904a0bd7fa3950d15b99c746c1bf76bece490f947bcd4fd6e
font_01_sfnt_off0000609d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x609D 18444 bytes
SHA-256: ee0fd3b8161b5983970ad4bc3604837358645b2154b845f85ded903745611adb

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